Contribution of a Cyanide-insensitive Alternate Respiratory System to Increases in Formamide Hydro-lyase Activity and to Growth in Stemphylium loti in Vitro

Stemphylium loti, a pathogen of a cyanogenic plant, possesses a cyanide-insensitive alternate respiratory pathway. In the absence of cytochrome inhibitors, the alternate system had only a minor role in respiration. When S. loti was grown in medium amended with antimycin to block the cytochrome chain, the alternate system accounted for the total oxygen consumption associated with respiration.